engineering Civil projects @ dreamweb techno solutions (1)
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Experimental Study on Admixtures
This study experimentally investigated the use of admixtures in concrete mixtures. Specifically, it examined partially replacing cement with fly ash and sand with stone dust. Concrete cubes were prepared with 15% replacements and tested at various ages. The results showed that stone dust concrete achieved compressive strengths close to normal concrete, with less than 5% reduction. Fly ash concrete saw reductions of around 10-15% in compressive strength compared to normal concrete. Both admixtures saw strength development over time. The study concluded that partial replacements of 15% are suitable for achieving strength in concrete mixtures.
Comparative Strength Studies of Recycled Aggregate Concrete and Fresh Concrete
The waste generated during the construction and demolition activities include sand, gravel, concrete, bricks, metal, plastic, glass etc. This construction and demolition waste is mainly disposed in landfills. Recycling and reuse of this waste will result in preservation of natural resources, effective utilization of growing waste stream, saving landfill space. This paper discusses the utilization of recycled aggregates as coarse aggregates in the preparation of concrete. In the present study, fresh concrete and recycled aggregate concrete (RAC) cubes are prepared and tested for compressive strength at the end of 7th, 14th and 28th days curing. The results are compared for both the types of concrete.
Building Highways on Sand – St. Petersburg, Russia
In this short version of the case study, you can see how Neoloy® Geocells double the lifespan of highway using locally available sandy soil.
Cseb
Compressed stabilized earth blocks (CSEBs) are earthen bricks created through compression in hand or hydraulic machines. CSEBs have a dry compressive strength of 3-6 MPa after 28 days, with higher strengths after longer periods. They have a density of 1700-2000 kg/cum and water absorption of 8-12% after immersion. CSEBs require less energy and are more cost effective than fired clay bricks or concrete blocks for construction. Machines for CSEB production cost around 73,500 Nu in Bhutan and 69,800 Rs in India, and can produce around 500 blocks per day. CSEBs are a relevant, sustainable construction material that should be adopted where possible.
Utilization of plastic waste as construction material
Utilization of plastic waste as construction material
As a material giving satisfactory strengths and values
IRJET- Experimental Investigation on Brick with Partially Replacement of ...
The document experimentally investigates partially replacing cement with corn cob ash in brick production to reduce costs and environmental impacts. Various mixtures of cement, corn cob ash, and sand were tested at replacement rates of 50%, 60%, and 70%, and the compressive strengths were tested at 7, 14, and 28 days of curing. Results showed that replacement rates of 50-60% corn cob ash provided adequate compressive strength while lowering costs, making it a viable and more sustainable partial cement replacement.
Fm3410261031
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Two-Lift Paving - TxDOT Perspective
A Two-Lift concrete Paving (2LCP) workshop was organized as a part of the Texas Department of Transportation (TxDOT) project 0-6749: Feasibility Study of Two-Lift Concrete Paving (2LCP). This workshop was conducted at the J. J. Pickle Research Campus (PRC), The University of Texas at Austin, Austin, TX on May 23rd, 2013. Dr. Jiong Hu, Texas State University, Research Supervisor, and Dr. David Fowler, The University of Texas at Austin, Co-Research Supervisor, co-chaired the workshop. The workshop offered the option of attending in person or remotely through webinar. Fifty-one attendees were present remotely or in person; 28 in person and 23 persons remotely.
Recommended
Experimental Study on Admixtures
This study experimentally investigated the use of admixtures in concrete mixtures. Specifically, it examined partially replacing cement with fly ash and sand with stone dust. Concrete cubes were prepared with 15% replacements and tested at various ages. The results showed that stone dust concrete achieved compressive strengths close to normal concrete, with less than 5% reduction. Fly ash concrete saw reductions of around 10-15% in compressive strength compared to normal concrete. Both admixtures saw strength development over time. The study concluded that partial replacements of 15% are suitable for achieving strength in concrete mixtures.
Comparative Strength Studies of Recycled Aggregate Concrete and Fresh Concrete
The waste generated during the construction and demolition activities include sand, gravel, concrete, bricks, metal, plastic, glass etc. This construction and demolition waste is mainly disposed in landfills. Recycling and reuse of this waste will result in preservation of natural resources, effective utilization of growing waste stream, saving landfill space. This paper discusses the utilization of recycled aggregates as coarse aggregates in the preparation of concrete. In the present study, fresh concrete and recycled aggregate concrete (RAC) cubes are prepared and tested for compressive strength at the end of 7th, 14th and 28th days curing. The results are compared for both the types of concrete.
Building Highways on Sand – St. Petersburg, Russia
In this short version of the case study, you can see how Neoloy® Geocells double the lifespan of highway using locally available sandy soil.
Cseb
Compressed stabilized earth blocks (CSEBs) are earthen bricks created through compression in hand or hydraulic machines. CSEBs have a dry compressive strength of 3-6 MPa after 28 days, with higher strengths after longer periods. They have a density of 1700-2000 kg/cum and water absorption of 8-12% after immersion. CSEBs require less energy and are more cost effective than fired clay bricks or concrete blocks for construction. Machines for CSEB production cost around 73,500 Nu in Bhutan and 69,800 Rs in India, and can produce around 500 blocks per day. CSEBs are a relevant, sustainable construction material that should be adopted where possible.
Utilization of plastic waste as construction material
Utilization of plastic waste as construction material
As a material giving satisfactory strengths and values
IRJET- Experimental Investigation on Brick with Partially Replacement of ...
The document experimentally investigates partially replacing cement with corn cob ash in brick production to reduce costs and environmental impacts. Various mixtures of cement, corn cob ash, and sand were tested at replacement rates of 50%, 60%, and 70%, and the compressive strengths were tested at 7, 14, and 28 days of curing. Results showed that replacement rates of 50-60% corn cob ash provided adequate compressive strength while lowering costs, making it a viable and more sustainable partial cement replacement.
Fm3410261031
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Two-Lift Paving - TxDOT Perspective
A Two-Lift concrete Paving (2LCP) workshop was organized as a part of the Texas Department of Transportation (TxDOT) project 0-6749: Feasibility Study of Two-Lift Concrete Paving (2LCP). This workshop was conducted at the J. J. Pickle Research Campus (PRC), The University of Texas at Austin, Austin, TX on May 23rd, 2013. Dr. Jiong Hu, Texas State University, Research Supervisor, and Dr. David Fowler, The University of Texas at Austin, Co-Research Supervisor, co-chaired the workshop. The workshop offered the option of attending in person or remotely through webinar. Fifty-one attendees were present remotely or in person; 28 in person and 23 persons remotely.
A REVIEW PAPER ON PROPERTIES OF CONCRETE WITH FRACTIONAL REPLACEMENT OF RECYC...
A REVIEW PAPER ON PROPERTIES OF CONCRETE WITH FRACTIONAL REPLACEMENT OF RECYC...International Research Journal of Modernization in Engineering Technology and Science
The document provides a literature review on the properties of concrete with fractional replacement of recycled coarse aggregates. It discusses 3 main points:
1) Several studies have shown that replacing natural coarse aggregates with recycled concrete aggregates can reduce the compressive strength of concrete, but treating recycled aggregates with water and acid can improve strengths.
2) Other studies found that replacing sand with copper slag as a fine aggregate and using recycled concrete aggregates as coarse aggregates can increase compressive strength up to 30% replacement.
3) The literature review concludes that compressive strength generally increases with higher quality recycled aggregates and copper slag, and workability increases with more copper slag. Strengths are also improved by the hardness of recycled aggregates and copper slag.Strengthening of concrete block
This document summarizes a project report on strengthening concrete blocks with the addition of rubber scrap and coconut shells. The report describes testing concrete blocks containing 5% rubber scrap replacing coarse aggregate. Fly ash was also added, varying from 0-20% replacing cement. The project aimed to reuse rubber waste and study the properties of rubberized concrete blocks. Testing found rubberized concrete more durable but weaker, with lower strength than ordinary concrete. Adding silica increased strength. Properties of concrete with 10-20% coarse aggregate replaced with coconut shells were also studied. Results showed lower strength but higher absorption in coconut shell concrete compared to normal concrete. The addition of fly ash and steel fibers improved mechanical properties. This study explored using waste materials like rubber and
IRJET- Flexural Behaviour of RCC Beam with Partial Replacement of Fine Aggreg...
This document presents research on the flexural behavior of reinforced concrete (RCC) beams with partial replacement of natural river sand with manufactured sand (M-sand) as fine aggregate. Three RCC beam sections were tested: under-reinforced, balanced, and over-reinforced. Beams were cast with 0%, 25%, 50%, and 75% replacement of natural sand with M-sand. Compressive strength cubes were also cast to determine the maximum replacement level. The beams were tested under two-point loading to examine their flexural behavior, load carrying capacity, cracking patterns, and deflection. The results were compared to analyze the behavior and performance of beams made with M-sand versus natural sand. The objective was
Study of Mechanical Properties in SCC by Blending Cement Partially With Fly A...
The development of self-compacting concrete has been one of the most important materials in the modern building industry. The purpose of this concrete concept is to decrease the risk due to human factor. The use of SCC is spreading worldwide because of its very attractive properties. In the present investigation Blended SCC is the one in which some percentage of cement content used for the concrete is replaced by any of the mineral admixtures. Here, the present study to development of blended self-compacting concrete by replaced in the mineral admixtures using Fly ash 0-30% and metakaolin 0-30% as the weight of cement. Study the rheological properties and mechanical properties of developed blended SCC mixes in the laboratory condition and different curing ages. In recent years, many researchers have established that the use of supplementary cementatious materials (SCMs) like blast furnace slag, silica fume, metakaolin (MK), fly ash (FA) and rice husk ash (RHA) etc. can, not only improve the various properties of concrete both in its fresh and hardened states, but also can contribute to economy in construction costsruning.
SELF COMPACTING CONCRETE. ppt.pptx
- The study aimed to determine the bond strength and chloride permeability of self-compacting concrete (SCC) compared to conventional concrete (CC).
- Materials were tested to determine properties and optimize an SCC mix with 20% fly ash replacement. Workability tests established acceptable SCC mixes.
- Mechanical properties like compressive and splitting tensile strength were found to be higher for SCC compared to CC at curing ages of 7, 14, and 28 days.
- Bond strength was evaluated through pullout tests and chloride permeability through rapid chloride permeability tests (RCPT), with results of SCC and CC compared.
Civil project tittles 2019
This document contains a list of 87 potential civil engineering project titles related to various topics including structural analysis and design, geotechnical engineering, transportation engineering, and construction materials. Some of the titles involve analyzing and designing structures like buildings, bridges, and foundations using software like STAAD and Plaxis. Other titles focus on utilizing waste materials in construction and evaluating their properties, or stabilizing problematic soil types like black cotton soil. The list covers a wide range of topics relevant to civil engineering project work.
An Experimental Investigation on Strength Behavior of Concrete by Replacing N...
Concrete is one of the most widely used construction material in the world. Destruction of concrete structure due to natural calamities like earthquake, tsunami or by the bombardment, it has became a major problem in finding place for dumping the concrete debris particularly in urban areas. This paper deals with the study of strength of concrete incorporating Recycled Aggregate concrete. The main objectives of this investigation is to find out up to what percentage the Natural Coarse Aggregate (N.C.A) can be replaced by R.C.A in the concrete mix and to find out the extra quantity of cement to be added for each percentage replacement by R.C.A to achieve its target mean strength A series of test were carried out to determine the compressive strength, split tensile strength, flexural strength with and without recycled aggregates. Natural coarse aggregates in concrete were replaced with 0%, 20%, 40%, 60%, 80% and 100% of crushed concrete coarse aggregate. For the strength characteristics, the result showed a gradual decrease in compressive strength, split tensile strength, flexural and modulus of elasticity as the percentage of recycled aggregate is increased.
Filler slab construction using coconut shell
The document describes an experimental study on using coconut shells as filler material in bubble deck slabs. A bubble deck slab is a type of slab that virtually eliminates concrete from the middle tension zone, reducing weight. The study aims to determine the load capacity of filler slabs with coconut shells and compare to conventional slabs. Specimens including cubes, cylinders and slabs with and without coconut shell filler were cast and will undergo testing to evaluate load capacity, cracking patterns, and compare performances between the slab types. The results will help analyze if coconut shell filler is a viable, cost-effective alternative to concrete in slabs.
IRJET- An Expermental Study on Self Compacting Concrete by Replacing by Marbl...
This study experimentally investigates the use of marble sludge powder and quarry rock dust to replace river sand in self-compacting concrete. Mix designs are developed to create self-compacting concrete using varying replacements of river sand with these industrial wastes. Tests are performed on fresh and hardened concrete to evaluate properties like flowability, compressive strength, and splitting tensile strength. The results show that partial replacements of up to 50% river sand with quarry rock dust and 20% marble sludge powder produce self-compacting concrete with comparable or improved strength and flowability properties compared to normal concrete. Using these industrial wastes helps reduce construction costs and environmental impacts of waste disposal.
abcdefg-190407034833 (1).pdf
The document describes an experimental study on constructing bubble deck slabs by inserting coconut shells. It aims to determine the load bearing capacity of filler slabs using coconut shells and compare it to conventional slabs. The study also aims to estimate the amount of concrete saved by using coconut shell fillers and to compare the strengths of conventional and filler slabs. It outlines the objectives, scope, literature review on previous similar studies, materials used including coconut shells and concrete mix design, and the methodology to be followed for casting specimens and conducting experimental testing and analysis.
IRJET - Experimental and Analytical Study on High Strength Concrete (M70)...
This document presents the results of an experimental study on high-strength concrete (M70) using recycled concrete aggregate (RCA). Tests were conducted to determine the effect of different percentages (10%, 20%, 30%) of coarse RCA on the concrete's compressive strength, durability, and engineering properties. The results showed that replacement of up to 30% coarse RCA had no effect on concrete strength, but higher percentages led to gradual strength reductions. However, with adjustments to the water-cement ratio, high-strength concrete with RCA can achieve equivalent performance to concrete with natural aggregates. The study aims to establish RCA concrete as a viable and sustainable construction material.
Experimental behaviour and analysis of stress in rigid pavement
This document summarizes an experimental study on the behaviour and analysis of stress in rigid pavements. It begins with an introduction on rigid pavements and their load carrying capacity. The methodology section outlines the concrete mix designs that will be tested, including conventional concrete and mixes replacing cement with silica fume and steel slag. The literature review summarizes previous studies on the effects of silica fume and pavement boundary depth. The objectives and scope are then provided. The document outlines the materials and experimental works conducted, including tests on flexural strength, modulus of elasticity, Poisson's ratio, bond strength, split tensile strength, coefficient of thermal expansion, and model tests on rigid pavement slabs. The results of these tests are presented
Zeroth Review PPT Format-1.pptx
The document summarizes an experimental investigation on using mineral admixtures and steel fibers in high strength concrete. It discusses that cement and concrete production uses significant natural resources and contributes to carbon dioxide emissions. The study aims to investigate using recycled fine aggregate and other alternate materials to enhance the strength and durability of high performance concrete, while reducing environmental impacts. The experimental work includes testing concrete mixtures with partial replacements of fine aggregate using recycled aggregate and additions of silica fume and steel fibers to determine their effects on compressive, tensile, and flexural strengths of the concrete.
C013151420
This document provides a critical review of using recycled coarse aggregate in self-compacting concrete. It summarizes several previous studies that investigated replacing natural coarse aggregate with recycled coarse aggregate from 0-100% in self-compacting concrete mixes. The key findings from the reviewed studies are that compressive strength and other mechanical properties generally decrease as the replacement ratio of recycled coarse aggregate increases, but self-compacting concrete can still meet design requirements with up to 30% replacement. Permeability and durability properties are also mostly unaffected by use of recycled coarse aggregate. Using recycled aggregate in concrete production helps reduce construction waste and demand for natural resources.
506-23-29
This document discusses a study on the effect of using recycled concrete aggregates in bituminous concrete surface courses. The study aims to evaluate strength variations when recycled aggregates partially or fully replace natural aggregates in bituminous concrete. Marshall's method was used to test strength variations with different replacement levels of recycled aggregates. The results found that replacement of natural aggregates up to 20% with recycled aggregates is possible without significantly impacting strength characteristics of the bituminous concrete. However, more binder content is required.
Silica fume
This document discusses the use of silica fume to modify steel slag concrete. It begins with an introduction to supplementary cementitious materials (SCMs) such as fly ash, slag cement, and silica fume. It then discusses the properties and uses of steel slag as an aggregate in concrete. The document presents a study that aims to evaluate the effects of adding silica fume at different percentages to replace cement in concrete mixtures using steel slag aggregate, slag cement, and fly ash cement. It describes the materials and testing methods used, including compressive strength, porosity, capillary absorption, and flexural strength tests. The results and conclusions of this study are discussed in the following chapters.
investigation of low cost concrete using industrial waste as supplimentry cem...
investigation of low cost concrete using industrial waste as supplimentry cem...Abhilash Chandra Dey
presentation on investigation of low cost concrete using industrial waste as supplimentry cementitious materialIRJET- Experimental Study on Reinforced Concrete Frame Infilled with Mud Conc...
- The document presents an experimental study on reinforced concrete frames infilled with mud concrete blocks.
- Three types of frames were tested under repeated lateral loads: a bare frame, a frame infilled with mud concrete blocks, and a frame infilled with mud concrete blocks that had a central opening.
- The performance of the infilled frames was compared based on strength, stiffness, energy dissipation, and crack distribution. The results provide insights into the behavior and properties of mud concrete blocks for use as sustainable infill materials in reinforced concrete frames.
An Experimental Investigation on Strength Characteristics of Concrete with Pa...
One of the approaches in improving the durability of concrete is to use blended cement materials such as fly ash, silica fume, slag and more recently, metakaolin. By changing the chemistry and microstructure of concrete, pozzolans reduce the capillary porosity of the cementitious system and make them less permeable to exterior chemical sources as well as reducing the internal chemical incompatilities such as alkali-silica reaction. The concrete industry is known to leave an enormous environmental footprint on Planet Earth. First, there are the sheer volumes of material needed to produce the billions of tons of concrete worldwide each year. Then there are the CO2 emissions caused during the production of Portland cement. Together with the energy requirements, water consumption and generation of construction and demolition waste, these factors contribute to the general appearance that concrete is not particularly environmentally friendly or compatible with the demands of sustainable development. Thus, use of these supplementary cementitious materials can reduce the effects of cement causing severe environmental impact. This study presents the results of different mechanical properties of concrete such as compressive strength, split tensile strength and flexural concrete by partially replacing cement with metakaolin and silica fume. The replacement of metakaolin is varied from 10%, 15%, 20% and 25% and silica fume from 6%, 8% and 10%. The property of concrete in fresh state that is the workability is also studied during the present investigation. The optimum doses of silica fume and metakaolin in combination were found to be 6% and 15% (by weight) respectively, when used as part replacement of ordinary Portland cement.
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A REVIEW PAPER ON PROPERTIES OF CONCRETE WITH FRACTIONAL REPLACEMENT OF RECYC...
A REVIEW PAPER ON PROPERTIES OF CONCRETE WITH FRACTIONAL REPLACEMENT OF RECYC...International Research Journal of Modernization in Engineering Technology and Science
The document provides a literature review on the properties of concrete with fractional replacement of recycled coarse aggregates. It discusses 3 main points:
1) Several studies have shown that replacing natural coarse aggregates with recycled concrete aggregates can reduce the compressive strength of concrete, but treating recycled aggregates with water and acid can improve strengths.
2) Other studies found that replacing sand with copper slag as a fine aggregate and using recycled concrete aggregates as coarse aggregates can increase compressive strength up to 30% replacement.
3) The literature review concludes that compressive strength generally increases with higher quality recycled aggregates and copper slag, and workability increases with more copper slag. Strengths are also improved by the hardness of recycled aggregates and copper slag.Strengthening of concrete block
This document summarizes a project report on strengthening concrete blocks with the addition of rubber scrap and coconut shells. The report describes testing concrete blocks containing 5% rubber scrap replacing coarse aggregate. Fly ash was also added, varying from 0-20% replacing cement. The project aimed to reuse rubber waste and study the properties of rubberized concrete blocks. Testing found rubberized concrete more durable but weaker, with lower strength than ordinary concrete. Adding silica increased strength. Properties of concrete with 10-20% coarse aggregate replaced with coconut shells were also studied. Results showed lower strength but higher absorption in coconut shell concrete compared to normal concrete. The addition of fly ash and steel fibers improved mechanical properties. This study explored using waste materials like rubber and
IRJET- Flexural Behaviour of RCC Beam with Partial Replacement of Fine Aggreg...
This document presents research on the flexural behavior of reinforced concrete (RCC) beams with partial replacement of natural river sand with manufactured sand (M-sand) as fine aggregate. Three RCC beam sections were tested: under-reinforced, balanced, and over-reinforced. Beams were cast with 0%, 25%, 50%, and 75% replacement of natural sand with M-sand. Compressive strength cubes were also cast to determine the maximum replacement level. The beams were tested under two-point loading to examine their flexural behavior, load carrying capacity, cracking patterns, and deflection. The results were compared to analyze the behavior and performance of beams made with M-sand versus natural sand. The objective was
Study of Mechanical Properties in SCC by Blending Cement Partially With Fly A...
The development of self-compacting concrete has been one of the most important materials in the modern building industry. The purpose of this concrete concept is to decrease the risk due to human factor. The use of SCC is spreading worldwide because of its very attractive properties. In the present investigation Blended SCC is the one in which some percentage of cement content used for the concrete is replaced by any of the mineral admixtures. Here, the present study to development of blended self-compacting concrete by replaced in the mineral admixtures using Fly ash 0-30% and metakaolin 0-30% as the weight of cement. Study the rheological properties and mechanical properties of developed blended SCC mixes in the laboratory condition and different curing ages. In recent years, many researchers have established that the use of supplementary cementatious materials (SCMs) like blast furnace slag, silica fume, metakaolin (MK), fly ash (FA) and rice husk ash (RHA) etc. can, not only improve the various properties of concrete both in its fresh and hardened states, but also can contribute to economy in construction costsruning.
SELF COMPACTING CONCRETE. ppt.pptx
- The study aimed to determine the bond strength and chloride permeability of self-compacting concrete (SCC) compared to conventional concrete (CC).
- Materials were tested to determine properties and optimize an SCC mix with 20% fly ash replacement. Workability tests established acceptable SCC mixes.
- Mechanical properties like compressive and splitting tensile strength were found to be higher for SCC compared to CC at curing ages of 7, 14, and 28 days.
- Bond strength was evaluated through pullout tests and chloride permeability through rapid chloride permeability tests (RCPT), with results of SCC and CC compared.
Civil project tittles 2019
This document contains a list of 87 potential civil engineering project titles related to various topics including structural analysis and design, geotechnical engineering, transportation engineering, and construction materials. Some of the titles involve analyzing and designing structures like buildings, bridges, and foundations using software like STAAD and Plaxis. Other titles focus on utilizing waste materials in construction and evaluating their properties, or stabilizing problematic soil types like black cotton soil. The list covers a wide range of topics relevant to civil engineering project work.
An Experimental Investigation on Strength Behavior of Concrete by Replacing N...
Concrete is one of the most widely used construction material in the world. Destruction of concrete structure due to natural calamities like earthquake, tsunami or by the bombardment, it has became a major problem in finding place for dumping the concrete debris particularly in urban areas. This paper deals with the study of strength of concrete incorporating Recycled Aggregate concrete. The main objectives of this investigation is to find out up to what percentage the Natural Coarse Aggregate (N.C.A) can be replaced by R.C.A in the concrete mix and to find out the extra quantity of cement to be added for each percentage replacement by R.C.A to achieve its target mean strength A series of test were carried out to determine the compressive strength, split tensile strength, flexural strength with and without recycled aggregates. Natural coarse aggregates in concrete were replaced with 0%, 20%, 40%, 60%, 80% and 100% of crushed concrete coarse aggregate. For the strength characteristics, the result showed a gradual decrease in compressive strength, split tensile strength, flexural and modulus of elasticity as the percentage of recycled aggregate is increased.
Filler slab construction using coconut shell
The document describes an experimental study on using coconut shells as filler material in bubble deck slabs. A bubble deck slab is a type of slab that virtually eliminates concrete from the middle tension zone, reducing weight. The study aims to determine the load capacity of filler slabs with coconut shells and compare to conventional slabs. Specimens including cubes, cylinders and slabs with and without coconut shell filler were cast and will undergo testing to evaluate load capacity, cracking patterns, and compare performances between the slab types. The results will help analyze if coconut shell filler is a viable, cost-effective alternative to concrete in slabs.
IRJET- An Expermental Study on Self Compacting Concrete by Replacing by Marbl...
This study experimentally investigates the use of marble sludge powder and quarry rock dust to replace river sand in self-compacting concrete. Mix designs are developed to create self-compacting concrete using varying replacements of river sand with these industrial wastes. Tests are performed on fresh and hardened concrete to evaluate properties like flowability, compressive strength, and splitting tensile strength. The results show that partial replacements of up to 50% river sand with quarry rock dust and 20% marble sludge powder produce self-compacting concrete with comparable or improved strength and flowability properties compared to normal concrete. Using these industrial wastes helps reduce construction costs and environmental impacts of waste disposal.
abcdefg-190407034833 (1).pdf
The document describes an experimental study on constructing bubble deck slabs by inserting coconut shells. It aims to determine the load bearing capacity of filler slabs using coconut shells and compare it to conventional slabs. The study also aims to estimate the amount of concrete saved by using coconut shell fillers and to compare the strengths of conventional and filler slabs. It outlines the objectives, scope, literature review on previous similar studies, materials used including coconut shells and concrete mix design, and the methodology to be followed for casting specimens and conducting experimental testing and analysis.
IRJET - Experimental and Analytical Study on High Strength Concrete (M70)...
This document presents the results of an experimental study on high-strength concrete (M70) using recycled concrete aggregate (RCA). Tests were conducted to determine the effect of different percentages (10%, 20%, 30%) of coarse RCA on the concrete's compressive strength, durability, and engineering properties. The results showed that replacement of up to 30% coarse RCA had no effect on concrete strength, but higher percentages led to gradual strength reductions. However, with adjustments to the water-cement ratio, high-strength concrete with RCA can achieve equivalent performance to concrete with natural aggregates. The study aims to establish RCA concrete as a viable and sustainable construction material.
Experimental behaviour and analysis of stress in rigid pavement
This document summarizes an experimental study on the behaviour and analysis of stress in rigid pavements. It begins with an introduction on rigid pavements and their load carrying capacity. The methodology section outlines the concrete mix designs that will be tested, including conventional concrete and mixes replacing cement with silica fume and steel slag. The literature review summarizes previous studies on the effects of silica fume and pavement boundary depth. The objectives and scope are then provided. The document outlines the materials and experimental works conducted, including tests on flexural strength, modulus of elasticity, Poisson's ratio, bond strength, split tensile strength, coefficient of thermal expansion, and model tests on rigid pavement slabs. The results of these tests are presented
Zeroth Review PPT Format-1.pptx
The document summarizes an experimental investigation on using mineral admixtures and steel fibers in high strength concrete. It discusses that cement and concrete production uses significant natural resources and contributes to carbon dioxide emissions. The study aims to investigate using recycled fine aggregate and other alternate materials to enhance the strength and durability of high performance concrete, while reducing environmental impacts. The experimental work includes testing concrete mixtures with partial replacements of fine aggregate using recycled aggregate and additions of silica fume and steel fibers to determine their effects on compressive, tensile, and flexural strengths of the concrete.
C013151420
This document provides a critical review of using recycled coarse aggregate in self-compacting concrete. It summarizes several previous studies that investigated replacing natural coarse aggregate with recycled coarse aggregate from 0-100% in self-compacting concrete mixes. The key findings from the reviewed studies are that compressive strength and other mechanical properties generally decrease as the replacement ratio of recycled coarse aggregate increases, but self-compacting concrete can still meet design requirements with up to 30% replacement. Permeability and durability properties are also mostly unaffected by use of recycled coarse aggregate. Using recycled aggregate in concrete production helps reduce construction waste and demand for natural resources.
506-23-29
This document discusses a study on the effect of using recycled concrete aggregates in bituminous concrete surface courses. The study aims to evaluate strength variations when recycled aggregates partially or fully replace natural aggregates in bituminous concrete. Marshall's method was used to test strength variations with different replacement levels of recycled aggregates. The results found that replacement of natural aggregates up to 20% with recycled aggregates is possible without significantly impacting strength characteristics of the bituminous concrete. However, more binder content is required.
Silica fume
This document discusses the use of silica fume to modify steel slag concrete. It begins with an introduction to supplementary cementitious materials (SCMs) such as fly ash, slag cement, and silica fume. It then discusses the properties and uses of steel slag as an aggregate in concrete. The document presents a study that aims to evaluate the effects of adding silica fume at different percentages to replace cement in concrete mixtures using steel slag aggregate, slag cement, and fly ash cement. It describes the materials and testing methods used, including compressive strength, porosity, capillary absorption, and flexural strength tests. The results and conclusions of this study are discussed in the following chapters.
investigation of low cost concrete using industrial waste as supplimentry cem...
investigation of low cost concrete using industrial waste as supplimentry cem...Abhilash Chandra Dey
presentation on investigation of low cost concrete using industrial waste as supplimentry cementitious materialIRJET- Experimental Study on Reinforced Concrete Frame Infilled with Mud Conc...
- The document presents an experimental study on reinforced concrete frames infilled with mud concrete blocks.
- Three types of frames were tested under repeated lateral loads: a bare frame, a frame infilled with mud concrete blocks, and a frame infilled with mud concrete blocks that had a central opening.
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An Experimental Investigation on Strength Characteristics of Concrete with Pa...
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